That’s the message from eminent Dallas attorney Tom Luce, who tried to referee a nasty fight over sunlight reflecting from the gleaming new Museum Tower into exhibit areas of the next-door Nasher Sculpture Center.

It’s easy to see why Luce cried foul on the Museum Tower’s owners, the Dallas Police & Fire Pension System, and told Mayor Mike Rawlings this week that he’d have to get someone else to broker a deal.

When he took on the job for the mayor last spring, Luce helped lay ground rules, including a news blackout, and both sides buttoned their lips — for a while.

Then came last month’s surprise splash of advertising for the luxury condo units, complete with spin about “an unexpected issue or two” popping up. This week brought a second surprise — a showy visit to the Nasher by pension fund officials and their public pronouncement ruling out one potential solution that had been under discussion.

That was too much for Luce, he told this editorial board Thursday, and it violated the agreement he thought he had — that the parties would knuckle down and bargain privately in good faith.

That good faith went out the window just as the city is preparing to snip the ribbon on the new Klyde Warren Park, at the foot of the $200 million condo tower.

As the festivities begin, it’ll be hard to look at the tower and not see a giant asterisk hanging off of it. The underlying message is: “Now open for business, but distracted by ugly fight with neighbors.”

That fight has attracted national attention in the arts community, and it’s a shame. The Dallas Arts District just recently finished its collection of performance halls and museums, and now one of them — the renowned Nasher — is dealing with a pugnacious new neighbor about glare into sensitive exhibit areas.

Rawlings has sized this up right: The outcome needs to protect both the future of the condo tower and the Nasher’s ability to preserve a venue for displaying valuable art.

One possible solution that has been on the table is a system of exterior louvers on the tower to deflect light, an idea that pension officials dismissed out of hand at the Nasher walk-through.

The next day, in a detailed rendition of their position, pension fund officials said they had a team of expensive experts on the case looking at possible fixes, including the exterior louvers. That just added to the confusion.

Rawlings had said he was “a little shocked” to hear pension officials abruptly take the louvers off the table.

If anything, tower owners have proved that they’re good at shock value. Long term, that’s not going to be helpful in selling a prime new downtown address with a lot of public pension money wrapped up in it.